You are Here: Home >< Maths

# Maximum value of 3+sin2x+2cos2x watch

1. As above
2. (Original post by Carman3)
As above
As soon as you see something of the form , you should be thinking about using Rsin/cos identities.

Especially for maximum/minimum questions.
3. (Original post by Carman3)
As above
What do you think? It's pretty obvious.
4. (Original post by RDKGames)
What do you think? It's pretty obvious.
ermm it is not obvious. the answer is not 6 btw.
5. (Original post by RDKGames)
Yeah it is. Max cos(2x) and sin(2x) can take up is 1 so replace them with it.
6. (Original post by notnek)
As soon as you see something of the form , you should be thinking about using Rsin/cos identities.

Especially for maximum/minimum questions.
Thanks i see it now
7. (Original post by the bear)
lol

### Related university courses

TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Updated: October 27, 2016
The home of Results and Clearing

### 2,722

people online now

### 1,567,000

students helped last year
Today on TSR

### University open days

1. SAE Institute
Animation, Audio, Film, Games, Music, Business, Web Further education
Thu, 16 Aug '18
2. Bournemouth University
Fri, 17 Aug '18
3. University of Bolton
Fri, 17 Aug '18
Poll
Useful resources

### Maths Forum posting guidelines

Not sure where to post? Read the updated guidelines here

### How to use LaTex

Writing equations the easy way

### Study habits of A* students

Top tips from students who have already aced their exams